testing

testing

Wait? can't you do like
f(x)=(a + 1/a)^2 + (a-1+1/(a - 1))^2

f'(x)=-2/a²(a+1/a)-2/(a-1)²(a-1(a-1+1/(a - 1))

(-2/a²)*(a+1/a)-(2/(a-1)²)*(a-1+1/(a-1))=0   ->  a=0.5

Yeah and if you look at the graph of the function (f(x)=(a + 1/a)^2 + (a-1+1/(a - 1))^2) you can see that 0.5 is a minimum, therefore no other value of a can make the y-value drop lower than 25/2. Problem solved :D Hope you understood me, english maths is not my favourite.